Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A126 Outlet Check Valve Assembly Price on request CTS-A11372 Tube Assy, Transducer to Check Valve, I2V Price on request CTS-5531-05 Solvent Bottle Filter, 5/pk Price on request